Iam after some info on the Second Generation Sunbird turbos, mainly head compoents.

Iam after specs on the following items:

Lifters (Tappets)
- Operating length
- Diameter
- Leak down rate

Valves & Springs
- Valve length
- Valve head diameter Inlet & Exhaust
- Valve stem diameter Inlet & Exhaust
- Valve stem to guide clearance
- Valve face angle
- Valve spring tension Closed & Open and at what height
- Valve stem installed height

With particular attention to the specs in bold.

If you have some helpful information that would be much appreciated! Please specify the year, capacity and engine number with the specs.

Please feel free to add additional specs that you think might be helpful! Usually this information is in Service and Repair manuals.

Thanks

I know it has not been updated of even maintained in a long time, but here is a good source for info on the turbo engine, including specs http://www.lt3engine.tk

Scotty Bishop wrote:I know it has not been updated of even maintained in a long time, but here is a good source for info on the turbo engine, including specs http://www.lt3engine.tk

Thanks alot that has got some great information. If anyone else has more Iam sure it would be a great help!

Cheers